CVE-2026-88779Memory overflow vulnerability leading to Denial of Service
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.7 | HIGH | 4.0NetScaler (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 7.5 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CISA required action
⚡ Known exploited · remediation due Oct 7, 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Details
- CVE ID
- CVE-2026-88779
- Status
- Analyzed
- Assigner (CNA)
- NetScaler
- Published
- Oct 4, 2026
- Last modified
- 2026-10-05 13:35 UTC
- Weaknesses
Affected Products
As published by the CNA in the CVE record.
NetScalerADC4 version ranges
- before 14.1-73.41
- before 13.1-64.28
- before 14.1-73.41 FIPS
- before 13.1-37.282
NetScalerGateway2 version ranges
- before 14.1-73.41
- before 13.1-64.28
References
- support.citrix.com https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174
- community.citrix.com https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88779